I wanted to created the illusion of skin that is a constant state of decay and 'spoiled'...like rancid meat in a broken fridge..I focused this idea around the mouth and created it by going into the final paint job with a q-tip and some 99% Alchohol and rubbing away at the paint revealing the raw latex..worked out pretty well....

I also sculpted the mouth in a fixed "BOO!" expression because he is a ghost afterall...